MHT CET Chemistry question

Irving William order of stability of complexes of divalent metal ions with same ligands is

(A)\mathrm{Cu^{2+} > Ni^{2+} > Co^{2+} > Fe^{2+} > Mn^{2+} > Cd^{2+}}Correct
(B)\mathrm{Ni^{2+} < Co^{2+} < Fe^{2+} < Mn^{2+} < Cd^{2+} < Cu^{2+}}
(C)\mathrm{Fe^{2+} > Mn^{2+} > Cd^{2+} > Cu^{2+} > Ni^{2+} > Co^{2+}}
(D)\mathrm{Fe^{2+} < Mn^{2+} < Cd^{2+} < Cu^{2+} < Ni^{2+} < Co^{2+}}

Answer: (A)

Solution

Stability of complexes increases across the first transition series as \mathrm{Mn^{2+} < Fe^{2+} < Co^{2+} < Ni^{2+} < Cu^{2+}} and falls for the larger

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Question ID VK-073172